Tooth for excavator-buckets.



No. 673,423. Patented May 7, l90l.

A. M. CUPPLES.

TOOTH FOR EXCAVATOR BUCKETS.

(Application filed Oct. 25, 1900.) (No Model.)

11E 1] v f I I I 3 .15... {r A 12 8 J0 7 I UNITED STATES PATENT OFFICE.

ANDREW M. CUPPLES, OF TYRONE, PENNSYLVANIA.

TOOTH FOR EXCAVATOR-BUCKETS.

SPECIFICATION forming part of Letters Patent No. 673,423, dated May 7,1901.

Application filed October 25, 1900. Serial No. 34,318. (No model.)

To all whom it may concern:

Be it known that I, ANDREW M. OUPPLES, a citizen of the United States,residing at Ty rone, in the countyof Blair and State of Pennsylvania,have. invented a new and useful Tooth for Excavator-Buckets, of whichthe following is a specification.

This invention relates to excavators and dredges, and has for its objectto provide an improved dipper-tooth for the excavatingbuckets thereof.It is furthermore designed to arrange for replacing the point of thetooth when worn or damaged without destroying or doing away with theshank of the tooth and also to arrange the removable point so as topermit of an adjustment of the jaws thereof to properly fit thenosepiece of a bucket.

With these and other objects in view the present invention consists inthe combination and arrangement of parts, as will be hereinafter morefully described, shown in the accom panyiug drawings,and particularlypointed out in the appended claims, it being understood that changes inthe form, proportion, size, and minor details may be made within thescope of the claims without departing from the spirit or sacrificing anyof the advantages of the invention.

In the drawings, Figure 1 is a perspective view of a dipper-buckethaving the improved teeth applied thereto. Fig. 2 isan enlarged detailsectional view taken through one of the teeth and the adjacent bottomportion of the bucket. Fig. 3 is a detail perspective view of a toothhaving the improved removable point.

Like characters of reference designate corresponding parts in all of thefigures of the drawings.

Referring to the drawings, 1 designatesthe fiat shank of the improvedtooth,which is provided at its front end with a segmental enlarged head2, the upper face of which is convex and merges into the upper flat faceof the shank, while the bottom face of the head is oifset below thebottom face of the shank and is fiat. The shoulder formed by the lowerportion of the head is slotted or bifurcated for the reception of thebottom edge of the nose 3 of the common or ordinary bucket 4, asindicated in Figs. 1 and 2 of the drawings.

The upper wall of this bifurcation is flush with the under side of theshank, so that the latter may lie fiat against the nosepiece or bottomof the bucket, to which the shank is connected by means of thefastenings 5, passing through the nosepiece and the shank, and the otherfastening 6, passing through the shank, the nosepiece, and the offsetshoulder portion of the head or jaw 7. It will now be observed that thebifurcation forms opposite jaws 1 and 7 ,which are designed to snuglyembrace the front bottom edge of the bucket or the nosepiece thereof, asthe case may be. The outer end of the enlarged head tapers outwardlyinto a blunt nose 8, which is reduced vertically, so as to form theupper transverse shoulder .9 and the bottom shoulder 10, which are invertical alinement, and are also located in advance of the inner end ofthe bifurcated rear portion of the head, and therefore in advance of thebottom edge of the bucket.

The removable point 11 is formed of steel, so as to withstand the wear,and is substantially triangular in shape, having a flat bottom edge 12and an upwardly and rearwardly inclined upper edge 13, which merges intothe convex upper edge of the head 2. The rear or inner butt end of thispoint is provided with a socket 14, which is open at opposite sides andis of the same shape and size as the nose portion of the head, which isdesigned to fit snugly within said socket with the upper and lower rearedges or shoulders of the point abutting snugly against the respectiveshoulders of the head. Suitable fastenings, such as rivets 15, arepassed through the removable point and the nose portion of the head, soas to firmly connect these parts. It will be observed that by reducingthe nose portion of the tooth the top and bottom of the point are flushwith the corresponding portions of the tooth, so as to present noprojections or obstructions to interfere with the forward progress ofthe bucket and prevent a free entrance of the excavated material intothe bucket. Moreover, the rear end of the point terminates in advance ofthe inner end of the bifurcated portion of the head, and therefore theopposite jaws l and 7 are free to be forcibly spread or drawn togetherto fit the thickness of the bottom edge of a bucket, which is animportant advantage of the present form of tooth.

What is claimed is 1. A dipper-tooth for excavator-buckets, oomprisingashank, having an enlarged head,

which projects at opposite sides thereof, the

rear end of one projecting portion having a longitudinal bifurcationforming opposite bendable jaws, the outer end of the head having areduced nose, forming opposite transverse shoulders located in advanceof the inner end of the bifurcation, and a removable hard point, havinga socket snugly receiving the nose, the opposite rear edges of thepoint, abutting against the respective shoulders of F. J. GATES, O. O.TEMPLETON.

